MoS_2纳米片及其增强环氧树脂基复合材料的制备与性能研究  

Preparation and Properties of MoS_2 Nanosheets and Their Epoxy Composites

作　　者：何亚飞[1] 郝立峰[1] 陆小龙[1] 杨帆[1] 矫维成[1] 刘文博[2] 王荣国[1] 

机构地区：[1]哈尔滨工业大学复合材料与结构研究所,哈尔滨150001 [2]哈尔滨工业大学材料学院,哈尔滨150001

出　　处：《高分子学报》2015年第2期197-203,共7页Acta Polymerica Sinica

基　　金：国际科技合作项目(项目号2013DFR50750);国家高技术研究发展计划(863计划;项目号2012AA03A203);国家自然科学基金(基金号51303039)资助项目

摘　　要：以液相分散法为基础制备了MoS2纳米片悬浮液.对该悬浮液进行了吸光性能和荧光性能表征;结果显示悬浮液荧光信号明显增强;同时得到增加超声时间、降低离心转速、采用粒径较大的块状粉末和加入球磨工艺这些因素是可以提高悬浮液的吸光度的优化工艺条件.采用微区荧光测试测得了单个MoS2纳米片的荧光光谱,其主峰位置在652 nm,对应的带隙能量是1.9 e V;还对单个纳米片进行退火处理,其荧光信号在退火后有所增强.对MoS2纳米片进行了AFM和SEM表征显示大部分纳米片的平面尺寸在几百纳米,厚度约为几纳米.另外,将MoS2纳米片悬浮液与E51环氧树脂混合,制备了MoS2纳米片增强环氧树脂基复合材料.对该复合材料进行了荧光性能和拉伸性能测试.结果显示复合材料的荧光信号也明显增强;且经退火后,因为复合材料内部残余热应力的关系,该复合材料的荧光信号的峰值位置出现移动.同时,该复合材料的韧性也有提升.The MoS2 nanosheets suspensions were prepared based on liquid exfoliation method. The suspensions are characterized by absorbance and photoluminescence （PL） spectroscopy. The results show the PL signal from suspensions is enhanced evidently. Meanwhile, the optimized processing conditions, such as increasing of ultrasonic time,decreasing of centrifugal rotational speed, using large-size bulk MoS2 and adding ball-milling process,could enhance the absorbance of the suspensions. Using micro-area PL testing can obtain the PL signal from single MoS2 nanosheet, and it＇ s PL main peak is located at 652 nm,which corresponds to a band gap of 1.9 eV. When the single MoS2 nanosheet is annealed,its PL signal is enhanced. The morphology of MoS2 nansosheets is characterized by SEM and AFM, the results show the most MoS2 nansosheets have a lateral size of several hundred nanometers and a thickness of several nanometers. Besides, MoS2 nansosheets reinforced epoxy composites were prepared by mixing MoS2 nansosheets suspension and E51 epoxy. The composites are characterized by PL and tensile testing. And the results show the PL signal from composites is enhanced as well. While the composites are annealed, the PL signal shows obvious shift which could be ascribed to residual thermal stress in the composites. Meanwhile, the toughness of the composites is also improved.

关 键 词：液相分散法 MoS2纳米片 荧光 复合材料 退火 残余热应力 

分 类 号：TQ327[化学工程—合成树脂塑料工业]